EPE Association: Pelincec 2005 - 02: Predictive Control I

Pelincec 2005 - 02: Predictive Control I
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 02: Predictive Control I

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   Novel Control Strategy of an AC/DC/AC Converter Using Power Relations
By José Rodriguez, Jorge Pontt, Pablo Correa, Ulrich Ammann, Patricio Cortés [View]
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Abstract: This paper presents a new control scheme for an AC/DC/AC converter using model based predictive control. The control strategy minimizes quality functions, which represent the desired behavior of the converter. At the inverter side, the load current error is minimized. At the input side, the active and reactive powers are directly controlled. The main advantages of this method are: no need of linear current controllers, coordinates transformations or modulators for converter and inverter. The use of a PI controller for the DC link is avoided. The rectifier operates with sinusoidal input currents and unity power factor, while sinusoidal currents are generated out at the inverter load.

   OPTIMIZED PREDICTIVE CONTROL OF A THREE-LEVEL NPC PWM-VOLTAGE SOURCE RECTIFIER
By G. Brando, A. Dannier, A. Del Pizzo [View]
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Abstract: The paper deals with a predictive control technique applied to a NPC-three level Voltage Source Rectifier (VSR), with PWM modulation. By means of some unrestrictive simplificative hypotheses, simple formulas are proposed to work out converter optimized switching functions, which are able to obtain current values equal to the imposed ones at the end of every sampling interval. Redundancy of the three-level structure is used to maintain constant the total and the middle-point voltage of the dc-link. Both numerical and experimental investigations are carried out on significant case-studies with reference to heavy transient operations in order to verify the performance of the proposed predictive algorithm.

   Minimization Current Error Area of the DC/AC Inverter Controlled by Predictive Current Control Method
By Adam Ruszczyk [View]
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Abstract: The predictive current controller of the DC/AC converter is presented in the article. The new predicted converter current vector locations can be evaluated thanks to the possibility of the current vector change directions prediction. The original a converter control method was developped basing on the presented the current vector changes analyze. This method enables to minimize the current vector error area and decrease the main switching frequency. One of advantages of proosed control is possibility a realization of controller in the look-up table controller form. The experimental results confirm the effectiveness of proposed control method.

   Discrete-time predictive modulation approach in multiswitching systems
By Maria Stefania Carmeli, Francesco Castelli-Dezza, Gabrio Superti-Furga [View]
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Abstract: Multiconverter systems are usually used for high power applications. In these cases a general and modular approach represents the best solution from control strategy viewpoint. Among modulation strategies, current techniques should be preferred as they allow high dynamic performances. Hysteresis current modulation strategies are characterised by the best performances in terms of dynamic response. Its main drawback is the variable switching frequency which increases power losses. The present paper proposes a discrete-time predictive modulation strategy, which can be applied to multi-switching converters. This method is an unconventional current modulation technique characterized by fixed frequency, high dynamic performances and pre-calculated commutation instants, which can be applied to current controlled voltage source converters.

Pelincec 2005 - 02: Predictive Control I
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 02: Predictive Control I
	[return to parent folder]

	Novel Control Strategy of an AC/DC/AC Converter Using Power Relations By José Rodriguez, Jorge Pontt, Pablo Correa, Ulrich Ammann, Patricio Cortés	[View] [Download]
Abstract: This paper presents a new control scheme for an AC/DC/AC converter using model based predictive control. The control strategy minimizes quality functions, which represent the desired behavior of the converter. At the inverter side, the load current error is minimized. At the input side, the active and reactive powers are directly controlled. The main advantages of this method are: no need of linear current controllers, coordinates transformations or modulators for converter and inverter. The use of a PI controller for the DC link is avoided. The rectifier operates with sinusoidal input currents and unity power factor, while sinusoidal currents are generated out at the inverter load.

	OPTIMIZED PREDICTIVE CONTROL OF A THREE-LEVEL NPC PWM-VOLTAGE SOURCE RECTIFIER By G. Brando, A. Dannier, A. Del Pizzo	[View] [Download]
Abstract: The paper deals with a predictive control technique applied to a NPC-three level Voltage Source Rectifier (VSR), with PWM modulation. By means of some unrestrictive simplificative hypotheses, simple formulas are proposed to work out converter optimized switching functions, which are able to obtain current values equal to the imposed ones at the end of every sampling interval. Redundancy of the three-level structure is used to maintain constant the total and the middle-point voltage of the dc-link. Both numerical and experimental investigations are carried out on significant case-studies with reference to heavy transient operations in order to verify the performance of the proposed predictive algorithm.

	Minimization Current Error Area of the DC/AC Inverter Controlled by Predictive Current Control Method By Adam Ruszczyk	[View] [Download]
Abstract: The predictive current controller of the DC/AC converter is presented in the article. The new predicted converter current vector locations can be evaluated thanks to the possibility of the current vector change directions prediction. The original a converter control method was developped basing on the presented the current vector changes analyze. This method enables to minimize the current vector error area and decrease the main switching frequency. One of advantages of proosed control is possibility a realization of controller in the look-up table controller form. The experimental results confirm the effectiveness of proposed control method.

	Discrete-time predictive modulation approach in multiswitching systems By Maria Stefania Carmeli, Francesco Castelli-Dezza, Gabrio Superti-Furga	[View] [Download]
Abstract: Multiconverter systems are usually used for high power applications. In these cases a general and modular approach represents the best solution from control strategy viewpoint. Among modulation strategies, current techniques should be preferred as they allow high dynamic performances. Hysteresis current modulation strategies are characterised by the best performances in terms of dynamic response. Its main drawback is the variable switching frequency which increases power losses. The present paper proposes a discrete-time predictive modulation strategy, which can be applied to multi-switching converters. This method is an unconventional current modulation technique characterized by fixed frequency, high dynamic performances and pre-calculated commutation instants, which can be applied to current controlled voltage source converters.